Wearing plate for hydraulic machines



Sept. 6 1927.

' W. M. WHITE WEARING PLATE FOR HYDRAULIC MACHINES Filed Ju ne 5, 1926 IPatented Sept 6, 1927.

' UNITED STATES PATENT OFFICE.

WILLIAM M. WHITE, OF MILWAUKEE, WISCONSIN.

WEARING PLATE FOR HYDRAULIC MACHINES.

Application filed June 5,

proved method of securely fastening liner plates in place, and foreffecting convenient removal thereof when replacement becomes desirable.A'further object of the invention is to provide improved wear plates forthe inlet casings of hydraulic turbines of the type wherein the water isdelivered toward the rotor past an annular series of adjustableguidevanes. These and other objects and advantages of the invention willbe apparent from the following description.

A clear conception of an embodiment of the invention and of the mode ofapplying and removing wear plates constructed in accordance therewith,may be had by referring to the drawing accompanying and forming a partof this specification in which like reference characters designate thesame or similar parts in the several views.

Fig. 1 is a fragmentary central verticalsection through a hydraulicturbine having the improved lining plates applied therein.

Fig. 2 is a horizontal section through the casing of 'the turbinedisclosed in Fig. 1, the section being taken along the line II-II ofFig. 1 looking downwardly.

Fig. 3 is a fragmentary sectional View showing details of the improvedlining ring fastening.

' The hydraulic turbine to which the invention has been applied by wayof illustration, comprises in general a rotor 2 consisting of an annularseries of vanes secured to a central hub and surrounded by a shroud ring4; a casing comprising an upper element 11,a lower element 12 and aspeed ring 7 enclosing the turbine rotor 2; an annular series ofadjustable inlet guide vanes 8 having pivots 9, 10 journalled in thecasing elements 11, 12 respectively; and a main shaft 5 secured to therotor 2 and coacting with a guide bearing 6 associated with theturbine'oasing. The adjustable inlet guide vanes "8 are simultaneouslymovable. by.

the rotor 2, to

1926. Serial No. 113,908.

means of mechanism associated with actuating arms 17 secured to theupper pivots 9, and the vanes 8 are 'swingable about the pivots 9, 10 tocontrol the flow of fluid from the speed ring 7 to the rotor 2.

The hub ofthe rotor 2 has an annular flange 3 extending away from therotor axis and 1n close proximity to the upper casing element 11. The'casing'element 11 is provided with an annular recess 20 which coactswith an annular series of segmental plane wearing plates 13, thesewearing plates be ing penetrated by the upper vane pivots 9.

An annular series of segmental curved retainer plates 15 coact with theinner edges of the wear plates 13 and extend in close proximity to theperiphery of the flange 3' thereby providing a runnlng joint.

The rotor shroud ring 4 is provided with a peripheral Wearing ring 22extending "in 7 close proximity to the lower casing element 12. Thecasing element 12 is provided'with an annular recess 21 which coactswith an annular series of segmental plane wearing plates 14 throughwhich the lower vane pivots 10 extend. An annular series of segmentalcurved retainer plates 16 coact with the inner edges of the wear plates14 and co operate with the rotor wearing ring 22 to provide a runningjoint.

The segment shaped plane wear plates 13, 14 are forced into the recesses20, 21 respec-' tively, by means of a radial wedge 19 as shown in Fig.2, the wedge 19 being held in place by the overlapping edges of the adjacent wear plates 13, 14 as indicated by the dotted lines. The wedge 19.is driven'outwardly between the ends of adjacent seg- 11161113 therebyurgingthe wear plates into the annular recess of theadjacent'casingelement.1 The segmental curved retainer plates 15, 16 areformed with wedge surfaces en 7 gageable with similar surfaces formedupon the inner edges of the wear plates 13, 14, and the retainer plates15, 16 are rigidly attached to the adjacent casing elements 11, 12'bymeans of screws 18 as shown in Fig. 3. I The liner plates 13, 14 areheld'in place solely by the overlapping portions of the casingelementsll, 12 and of the retainer plates 15, 16', and obviouslycooperate with the end surfaces of the movable guide vanesS, while theliner plates 15, 16 cooperate with the movable fla'nge 3 and wearingring. 22 of surfaces.

protect all of the wearable guide vanes 8.

wear takes place between the ends of the vanes 8 and the adjacent casingelements, and this wear is taken up by the removable lining plates 13,14. Due to rotation of the rotor 2, considerable wear also takes placebetweenthe rotor flange 8 and wearing ring 22 and. the adjacent caslngelements. This wear is taken up by the removable lining plates 15, 16cooperatingwith the flange 3 and with the ring 22 respectively.

As the lining plates 13, 14,, 15, 16 may eventually wear to, such anextent that re placement thereof becomes desirable, these plates mayreadilybe removed by separating the casing elements 11, 12 and removingthe After the guide vanes 8 have been removed, the segmental plates 15,16 may be removed by releasing the screws 18. When the plates 15, 16have been withdrawn the wedge 19 may be withdrawn, whereupon the plates13,1 are freely removable from Within the retaining; recesses 20, 21.The mode of assembling the struc ture may be effected by reversingthesteps of removal, and both removal and assemblage may obviously bequickly effected with minimum delay in operation of the turbine unit. 7

It should be understood that it is not de sired to limit the inventionto the exact details of construction and to the precise mode of applyingand of removing the improved liner plates, for various modificationswithin the scope of the claims may occur to persons skilled in the art.

It is claimed and desired to secure by Letters Patent:

1. In combination, a rotor, a casing form ing a fluid conducting conduitcommunicating with said rotor, an annular series of segment shapedplates providing a lining for said casing adjacent to said conduit, andmeans cooperable with the adjacent ends of two of said plates forforcing adjoining ends of other ofrsaid plates into intimate contactwith each other.

catin'g with said rotor, an annular series of segment shaped planeplates providing a lining for said casing extending parallelto saidconduit, and an annular series of segment shaped curved plates coactingwith the edges of said plane plates and extending laterally away fromsaid conduit.

5. In combination, a rotor, a'casing forming a fluid conducting conduitextending transversely of the axis of and'communicating with said rotor,an anriularseriesof segment shaped plane plates having outeredgesdisposed within a recess of said casing and providing a liningtherefor adjacent to said'conduit, means for forcing-the adjoining ends,of said segments into intimate contact with each other, and an annularseries of segment shapedcurved plates coacting with the inner edges ofsaid plane plates and extending laterally, away from said conduit. j I

6. In combination, a roto'r,'a casing forming a fluid conducting conduitcommunicating with said rotor, an annular series of guide vanes spanningsaid conduit,.'an annular series of segment shaped plates providing'alining for said casing'adjacentto the corresponding ends of said vanes,and means cooperable with the adjacent ends of two of said plates forforcing the adjoining ends of other of said plates into intimate contactwith each other.

7. In combination, arotor, a casing forming a fluid conducting conduitcommunicating with said rotor, an annular series of guide vanes spanningsaid conduit,annular series of'segmental shaped plates providing liningsfor saidcasing adjacent to the opposite ends of said vanes, and a' wedgefor forcing the adjoining ends of said-plates into intimate contact witheach other;

8. In combination, a rotor, a'casing forming a fluid conducting conduitcommunicating with said rotor, said casing having an annular recesstherein, a series offsegment shaped plates coacting with said recess andproviding a lining for said casing, I and means cooperable with theadjacent ends of two of said plates for forcing theradjoining ends ofother ofsaid platesinto intimate contact witheach other and with saidcasing recess.

9. In combination, a ,rotor, a casingrforming a fluid conducting conduitcommunicatmg wlth said rotor, sald casmg having an annular recesstherein, an annular series of segment shaped wearlng plates extendinginto sald .recess and provldlng a lining for said casing, means forforcing the adjoiningends of said plates into intimate contact with eachother, an annular series of segment shaped curved plates formed toretain said wearing plates in coaction with said recess, and means forattaching said curved plates to said casing.

10. In combination, a casing having an annular recess therein, a seriesof wear plates coacting with said casing recess, and means for applyingendwise pressure to some of said plates to force said series intointimate contact with said recess.

11. In combination, a rotor, a casing forming a fluid conducting conduitcommunicating with said rotor and having an annular undercut recesstherein, an annular series of wearing plates providing a lining for saidcasing and having outer edge portions extending into said recess, and anannular series of retaining plates having wedge surfaces cooperable withthe inner edge portions of said wearing plates to retain said wearingplates in position.

12. In combination, a casing having an annular undercut surface forminga recess therein, a series of wearing plates having outer surfacescoacting with the undercut surfaces of said casing recess, and means forforcing some of said plates apart to retain said plate and casingsurfaces in engagement with each other.

In testimony whereof, the signature of the inventor is affixed hereto.

WILLIAM M. WHITE.

